2008

5.3

2004

5.6

1995

7.7

2000

5.5

2002

7.0

2003

7.0

1993

5.4

1967

6.2

1990

6.3

1984

7.1

1999

4.4

2008

5.6

1988

2.0

1981

7.0

1983

6.5

2017

6.0

1998

4.9

2018

6.0

2008

7.0

2005

6.5